16 PAMPHLETS, BROCHURES, NEWSLETTERS, JOURNALS, PERIODICAL MAGAZINES, AND BOOKS, ALL BEING TECHNICAL PUBLICATIONS IN THE FIELDS OF ENGINEERING AND SCIENCE; MOUNTED AND UNMOUNTED PHOTOGRAPHS; STATIONERY AND OFFICE REQUISITES, NAMELY, LETTERHEAD PAPER, INVOICES AND RECEIPTS, BLOTTING PAPER PADS; PAPERWEIGHTS; PRINTED INSTRUCTIONAL, EDUCATIONAL AND TEACHING MATERIALS IN THE FIELDS OF TECHNICAL, SCIENTIFIC AND ENGINEERING SUBJECTS; PLAYING CARDS; AND PRINTING BLOCKS